Very important!
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Two of the most important numbers in mathematics, pi and e (Euler's number) are both transcendental. Both are used in almost all branches of mathematics, and through that, in our daily lives even if you are not aware of them.
Numbers on a bar code are important because it is how the scanner recognizes the what product you are trying to buy. The lines and dashes are important to this as well.
Vitally
All numbers are important.
It's Important, because "Pascaline" is a calculator. It makes our lives easier!